Fourteen-year-old Sean MeCallum lay in a hospital bed waiting for a new heart. Without it, Scan would die. Sean’ s case is not u

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问题     Fourteen-year-old Sean MeCallum lay in a hospital bed waiting for a new heart. Without it, Scan would die. Sean’ s case is not unusual. Everyday many people die because there just aren’ t enough human organs to go around.
    Now scientists say they can alter the genetic make-up of certain animals so that their organs may be acceptable to humans. With this gene-altering technique to overcome our immune rejection to foreign organs, scientists hope to use pig hearts for transplants by the year 2008.
    That prospect, however, has stirred up strong opposition among animal fight activists. They protest that the whole idea of using animal organs is cruel and unjust; some scientists also fear such transplants may transform unknown diseases to humans.
    Others believe transplanting animal organs into humans is unnecessary. Millions of dollars spent on breeding pigs for their organs could be better spent on health education programs. They believe seventy-five percent of the heart disease cases that lead to a need for organ transplant are preventable. The key is to convince people to eat healthfully, and not to smoke or drink alcohol. Scientists could also use research funds to improve artificial organs.
    Still others believe that though new inventions and prevention programs may help, spending money to encourage more people to donate their organs is an even better idea. If enough people were educated about organ donations, everyone who needed an organ could be taken off the waiting list in a year.
It can be inferred from the concluding paragraph of the passage that______.

选项 A、the gene-altering technique will help those waiting for organ transplants
B、the present supply of human organs still has potential to be explored
C、people prefer the use of animal organs for medical purposes
D、the gene-altering technique leaves much to believed

答案B

解析 文章最后一段提到鼓励更多的人捐献他们的器官是一个更好的解决方案,If enoughpeople were educated about organ donations,everyone who needed an organ could be takenoff the waiting list in a year.如果足够的人接受了关于捐献器官的教育,每一个需要器官移植的人都会在一年内得到满足。这与B项说法吻合,现今人体器官的供应仍有扩展的潜力。
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